CES Air Quality Monitoring & Standards

Question 1

What are the six criteria pollutants regulated under the National Ambient Air Quality Standards (NAAQS)?

Accepted Answer

Carbon monoxide, lead, nitrogen dioxide, ozone, particulate matter, and sulfur dioxide

Answer

Methane, benzene, mercury, arsenic, radon, and asbestos

Answer

Hydrogen sulfide, ammonia, chlorine, formaldehyde, toluene, and xylene

Answer

Carbon dioxide, water vapor, nitrogen, oxygen, argon, and helium

Question 2

What is the difference between primary and secondary NAAQS?

Accepted Answer

Primary standards protect public health; secondary standards protect public welfare including crops, vegetation, and buildings

Answer

Primary standards are stricter; secondary standards are relaxed versions

Answer

Primary standards apply to factories; secondary standards apply to vehicles

Answer

There is no difference; they are identical

Question 3

What is PM2.5 and why is it a significant health concern?

Accepted Answer

Particulate matter with diameter less than 2.5 micrometers that can penetrate deep into the lungs and enter the bloodstream

Answer

Particles exactly 2.5 millimeters in diameter

Answer

A type of chemical pollutant in water

Answer

A measurement of noise pollution

Question 4

What is a nonattainment area under the Clean Air Act?

Accepted Answer

A geographic area that does not meet one or more NAAQS for a criteria pollutant

Answer

An area where no air quality monitoring stations exist

Answer

A region that has achieved all air quality standards

Answer

A zone where industrial activity is prohibited

Question 5

What is ground-level ozone and how is it formed?

Accepted Answer

A secondary pollutant formed when nitrogen oxides and volatile organic compounds react in sunlight

Answer

Ozone naturally released from the ground during earthquakes

Answer

A primary pollutant emitted directly from car exhaust

Answer

A beneficial gas that protects against UV radiation at ground level

Question 6

What is the Air Quality Index (AQI) used for?

Accepted Answer

To communicate daily air quality conditions and associated health risks to the public

Answer

To rank cities by their total industrial emissions

Answer

To calculate penalties for Clean Air Act violations

Answer

To measure indoor air quality in office buildings